Altera SerialLite II Protocol - Manual (Page 25)

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SerialLite II Protocol Reference Manual
SerialLite II Specification
Continuation of Data Packet Sequence {CDP}
The continuation of data packet sequence consists of two symbols as
shown in
Table 2–11 . The first symbol is the /CDP/ control symbol. The
second symbol is a data code-group that can be used to convey a channel
number for channel multiplexing. The channel number represent the
packet segment to be continued.
Continuation of Priority Packet Sequence {CPP}
The continuation of priority packet sequence consists of two symbols as
shown in
Table 2–12 . The first symbol is the /CPP/ control symbol. The
second symbol is a data code-group that is divided into two sections. The
upper nibble contains a segment identification number and is used for
retry-on-error (see
“Retry-on-Error (Optional)” on page 2–64 ). The lower
nibble can be used to convey a channel number for channel. The channel
number represents the packet segment to be continued.
Ordered Sequences
The SerialLite II protocol defines a number of sequences as ordered sets.
As such, each element of the sequence is a symbol that appears on all
lanes simultaneously in a column.
f
See “Link Initialization and Training” on page 2–27 for more information
on link training.
Table 2–11. {CDP} Composition
Field Symbol Description
CDP1 /CDP/ Continuation of Data Packet Symbol
CDP2 /DAT/ Channel Number
Table 2–12. {CPP} Composition
Field Symbol Description
CPP1 /CPP/ Continuation of priority packet symbol
CPP2 /DAT/ Segment identification/channel number